var person = { name: "huoty"};
console.dir(person);

person.age = 23;
console.dir(person);

person.eat = function (stuff) { console.info("I am eating " + stuff); };
//delete person.age;
console.dir(person);

console.info("name is %s, age is %s", person["name"], person.age);
person["eat"]("apple");
